- Press the 'Master' button.
- Use the Data Entry Control to select the 'Factory Reset' or 'Initialize User Presets' option (Page 51 in manual).
- Follow the prompts to confirm the reset.
Source: Proteus 1000 — proteus1000ownersmanual (manual)
Symptoms this guide addresses
Source: Proteus 1000 — proteus1000ownersmanual (manual)